Multiple inheritance often makes it extremely difficult to tell where my code is coming from.

When you don't use inheritance, you often get to refer to another module by name. E.g.

`my_dependency.fetch_data(123523)`

With multiple inheritance, however, that other module has become your own "self"!

Suddenly you're stuck with:

`self.fetch_data(123523)`.

And if you want to find the source of `fetch_data()`, you basically have to grep / look through all seven of your base classes.

If you're lucky, the definition you were looking for calls `self.flush()`, where `flush` isn't defined on this class. It's actually intended to be defined on another base class, which is imported by the multiple-inherited subclass.

So, you effectively have a "DSL" whose "statements" consist of your choice of base classes. It's impossible to determine what's a legal "program" in this "DSL" until you run the thing and get method-missing errors.